Add packed stack blocks and chain timer loss

styles.css

@@ -324,6 +324,30 @@ canvas {
     transform: scale(1.06);
     animation: goalAura 760ms ease-in-out infinite;
 }
+.timer-card.hidden {
+    display: none;
+}
+.timer-bar {
+    background: linear-gradient(135deg, #f97316, #ef4444);
+}
+.timer-bar.timer-urgent {
+    animation: timerPulse 600ms ease-in-out infinite;
+    box-shadow: 0 0 12px rgba(248, 113, 113, 0.5);
+}
+@keyframes timerPulse {
+    0% {
+        transform: scaleY(1);
+        filter: brightness(1);
+    }
+    50% {
+        transform: scaleY(1.25);
+        filter: brightness(1.2);
+    }
+    100% {
+        transform: scaleY(1);
+        filter: brightness(1);
+    }
+}
 @keyframes goalPulse {
     0% {
         transform: scaleY(1);